For several years, astronomers have been aware of a much-ballyhooed “city-killer” asteroid named YR4 2024, which is hurtling ...

YR4 has a very small chance of impacting Earth on Dec. 22, 2032- but one that has increased slightly since it was first spotted. The latest impact probability is available on the automated Sentry page ...

Amazon’s iconic pink river dolphins are facing a dramatic population decline, and scientists are rushing to uncover the reasons. Climate change, pollution, habitat destruction, and illegal fishing are ...